diff options
| author | Robert Lee <robert.lee@freescale.com> | 2009-12-02 20:54:38 -0600 |
|---|---|---|
| committer | Robert Lee <robert.lee@freescale.com> | 2009-12-04 18:47:29 -0600 |
| commit | cabe0ffb54399e5fa696507cd248848ec68ed153 (patch) | |
| tree | 2b482b4e4439102820b2edb8f1a5b0097f00c5b4 /arch | |
| parent | 9ccdd6f01995bdede051ee802725f7a966cc03bf (diff) | |
ENGR00118995 iMX23: power supply protection mechanism must be implemented.
iMX23: power supply protection mechanism must be implemented
in order to properly protect the SoC from damage or getting
into a locked up state. Several chip errata exists which (some are
documented and some are not yet documented at the time of this writing).
Signed-off-by: Robert Lee <robert.lee@freescale.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-stmp378x/pm.c | 18 | ||||
| -rw-r--r-- | arch/arm/plat-stmp3xxx/devices.c | 33 |
2 files changed, 50 insertions, 1 deletions
diff --git a/arch/arm/mach-stmp378x/pm.c b/arch/arm/mach-stmp378x/pm.c index a3662c3a5627..32f87ee18a9d 100644 --- a/arch/arm/mach-stmp378x/pm.c +++ b/arch/arm/mach-stmp378x/pm.c @@ -123,6 +123,8 @@ static void stmp378x_standby(void) /* half the fets */ __raw_writel(BM_POWER_MINPWR_HALF_FETS, REGS_POWER_BASE + HW_POWER_MINPWR_SET); + __raw_writel(BM_POWER_MINPWR_DOUBLE_FETS, + REGS_POWER_BASE + HW_POWER_MINPWR_CLR); __raw_writel(BM_POWER_LOOPCTRL_CM_HYST_THRESH, REGS_POWER_BASE + HW_POWER_LOOPCTRL_CLR); @@ -130,6 +132,15 @@ static void stmp378x_standby(void) REGS_POWER_BASE + HW_POWER_LOOPCTRL_CLR); __raw_writel(BM_POWER_LOOPCTRL_EN_DF_HYST, REGS_POWER_BASE + HW_POWER_LOOPCTRL_CLR); + + + stmp3xxx_clearl(BM_POWER_LOOPCTRL_CM_HYST_THRESH, + REGS_POWER_BASE + HW_POWER_LOOPCTRL); + stmp3xxx_clearl(BM_POWER_LOOPCTRL_EN_CM_HYST, + REGS_POWER_BASE + HW_POWER_LOOPCTRL); + stmp3xxx_clearl(BM_POWER_LOOPCTRL_EN_DF_HYST, + REGS_POWER_BASE + HW_POWER_LOOPCTRL); + /* enable PFM */ __raw_writel(BM_POWER_LOOPCTRL_HYST_SIGN, REGS_POWER_BASE + HW_POWER_LOOPCTRL_SET); @@ -163,6 +174,13 @@ static void stmp378x_standby(void) (3 << BP_POWER_LOOPCTRL_EN_RCSCALE), REGS_POWER_BASE + HW_POWER_LOOPCTRL); + /* double the fets */ + __raw_writel(BM_POWER_MINPWR_HALF_FETS, + REGS_POWER_BASE + HW_POWER_MINPWR_CLR); + __raw_writel(BM_POWER_MINPWR_DOUBLE_FETS, + REGS_POWER_BASE + HW_POWER_MINPWR_SET); + + /* Restore VDDD */ __raw_writel(reg_vddd, REGS_POWER_BASE + HW_POWER_VDDDCTRL); diff --git a/arch/arm/plat-stmp3xxx/devices.c b/arch/arm/plat-stmp3xxx/devices.c index e55846559362..c0502ac9f506 100644 --- a/arch/arm/plat-stmp3xxx/devices.c +++ b/arch/arm/plat-stmp3xxx/devices.c @@ -484,11 +484,42 @@ struct platform_device stmp3xxx_dcp = { }; static struct resource battery_resource[] = { - { + {/* 0 */ .flags = IORESOURCE_IRQ, .start = IRQ_VDD5V, .end = IRQ_VDD5V, }, + {/* 1 */ + .flags = IORESOURCE_IRQ, + .start = IRQ_DCDC4P2_BO, + .end = IRQ_DCDC4P2_BO, + }, + {/* 2 */ + .flags = IORESOURCE_IRQ, + .start = IRQ_BATT_BRNOUT, + .end = IRQ_BATT_BRNOUT, + }, + {/* 3 */ + .flags = IORESOURCE_IRQ, + .start = IRQ_VDDD_BRNOUT, + .end = IRQ_VDDD_BRNOUT, + }, + {/* 4 */ + .flags = IORESOURCE_IRQ, + .start = IRQ_VDD18_BRNOUT, + .end = IRQ_VDD18_BRNOUT, + }, + {/* 5 */ + .flags = IORESOURCE_IRQ, + .start = IRQ_VDDIO_BRNOUT, + .end = IRQ_VDDIO_BRNOUT, + }, + {/* 6 */ + .flags = IORESOURCE_IRQ, + .start = IRQ_VDD5V_DROOP, + .end = IRQ_VDD5V_DROOP, + }, + }; struct platform_device stmp3xxx_battery = { |